8 papers
Dissecting the Obscured Core of GN20: an Active Galactic Nucleus Outshone by Young Stars
M. Hamed, L. Colina, P. G. Pérez-González +17
We investigate the relative contributions of star formation and AGN activity to the total energy budget of GN20, one of the most luminous dusty star-forming galaxies known at …
A stellar bar hidden in an extreme gas-rich disk galaxy at z=4.055
Leindert A. Boogaard, Luca Costantin, Thor Tepper-GarcÃa +14
The classical picture for the formation of stellar bars -- key dynamical drivers of the evolution of galaxies -- is through secular evolution of instability in gas poor, stellar-do…
Little Red Dots: One Photometric Tag Concealing Diverse Spectroscopic Flavors of Massive Star Formation and Black Hole Activity
Pablo G. Pérez-González, Guillermo Barro, Stefano Carniani +62
We compile JWST/NIRSpec prism and MIRI data for 249 Little Red Dots (LRDs) at 2.3<z<9.3, forming a representative spectroscopic subset of NIRCam-selected LRDs. We derive a median s…
There Is More to Outshining: 2D Dust Effects on Stellar Mass Estimates at with JWST in the JADES Field
M. Hamed, P. G. Pérez-González, M. Annunziatella +15
Dust attenuation modifies the observed spectral energy distribution (SED), leading to biases in the properties inferred from integrated SED fitting. As spatially resolved SED model…
GA-NIFS: AGN activity in a Lyα emitter within a triple-AGN system anchored by a passive galaxy at z=3
Michele Perna, Santiago Arribas, Mahmoud Hamed +15
Massive quenched galaxies at z>3 challenge models of early galaxy evolution, as their rapid formation and abrupt quenching require efficient feedback, often linked to active galact…
The rise of the galactic empire: luminosity functions at and estimated with the MIDISNGDEEP ultra-deep JWST/NIRCam dataset
Pablo G. Pérez-González, Göran Ãstlin, Luca Costantin +39
We present a sample of six F200W and three F277W dropout sources identified as galaxy candidates using the deepest JWST/NIRCam data to date (5 depths mag a…